CN106884316A - A kind of preparation method of photocatalyst-type floride-free super-hydrophobic automatically cleaning textile - Google Patents
A kind of preparation method of photocatalyst-type floride-free super-hydrophobic automatically cleaning textile Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
- D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/01—Stain or soil resistance
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
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Abstract
本发明公开了一种光催化型无氟超疏水自清洁纺织品的制备方法，室温条件下，将疏水性二氧化硅颗粒分散于溶剂A中并超声处理获得二氧化硅分散液；然后向分散液中加入四氯化钛；之后将分散液升温至60℃并搅拌均匀，再移入密闭的聚四氟乙烯容器中水热处理，离心分离后获得二氧化硅/二氧化钛复合颗粒，洗涤、烘干后获得光催化超疏水复合粉体；将复合粉体分散于溶剂B中并超声处理获得光催化超疏水复合粉体分散液，再将洁净纺织品浸渍于该复合粉体分散液中，浸轧、烘干得到光催化型无氟超疏水自清洁纺织品。该制备方法可避免含氟拒水拒油整理剂对环境安全和人体健康的潜在威胁，同时可有效降解附着在织物表面的有机污渍，赋予纺织品长效自清洁性能。
The invention discloses a preparation method of a photocatalytic fluorine-free superhydrophobic self-cleaning textile. At room temperature, hydrophobic silicon dioxide particles are dispersed in a solvent A and ultrasonically treated to obtain a silicon dioxide dispersion; Add titanium tetrachloride to the mixture; then heat the dispersion to 60°C and stir evenly, then transfer it to a closed polytetrafluoroethylene container for hydrothermal treatment, obtain silica/titanium dioxide composite particles after centrifugation, wash and dry to obtain Photocatalytic superhydrophobic composite powder; disperse the composite powder in solvent B and ultrasonically treat it to obtain a photocatalytic superhydrophobic composite powder dispersion, then impregnate clean textiles in the composite powder dispersion, pad and dry A photocatalytic fluorine-free superhydrophobic self-cleaning textile was obtained. The preparation method can avoid the potential threat of the fluorine-containing water and oil repellent finishing agent to environmental safety and human health, and at the same time can effectively degrade the organic stains attached to the surface of the fabric, and endow the textile with long-term self-cleaning performance.
Description
技术领域technical field
本发明属于功能纺织品制备领域，具体涉及一种光催化型无氟超疏水自清洁纺织品的制备方法。The invention belongs to the field of preparation of functional textiles, and in particular relates to a preparation method of photocatalytic fluorine-free superhydrophobic self-cleaning textiles.
背景技术Background technique
含氟整理剂被广泛用于纺织品染整加工制备拒水拒油纺织品，但使用效果最佳的长氟碳链聚合物拒水拒油整理剂在生产或使用过程中会产生稳定的代谢终产物全氟辛烷磺酸盐或全氟辛酸，这些物质已被证实可严重威胁人体健康和环境安全，使得该类拒水拒油整理剂的使用受到国际社会的限制。各大助剂公司与印染企业正着力开发含氟拒水拒油整理剂的有效替代品及相应加工工艺，目前市场上的无氟拒水整理剂主要包括有机硅类、树状大分子类以及基于碳氢化合物的无氟聚合物等，这类整理剂可以赋予织物良好的拒水性能，但均无拒油性能。而日常生活中，人们经常会接触到油渍等有机污染物，这类污染物可以轻易润湿、渗透拒水纺织品，导致纺织品丧失自清洁功能。Fluorine-containing finishing agents are widely used in textile dyeing and finishing to prepare water- and oil-repellent textiles, but the best long-fluorocarbon chain polymer water- and oil-repellent finishing agents will produce stable metabolic end products during production or use Perfluorooctane sulfonate or perfluorooctanoic acid, these substances have been proven to seriously threaten human health and environmental safety, making the use of such water and oil repellent finishing agents restricted by the international community. Major auxiliaries companies and printing and dyeing companies are making great efforts to develop effective substitutes and corresponding processing techniques for fluorine-containing water and oil repellent finishing agents. Currently, fluorine-free water-repellent finishing agents on the market mainly include silicones, dendrimers and based on Fluorine-free polymers of hydrocarbons, etc., such finishing agents can give fabrics good water repellency, but none of them have oil repellency. In daily life, people often come into contact with organic pollutants such as oil stains, which can easily wet and penetrate water-repellent textiles, causing the textiles to lose their self-cleaning function.
除了超疏液（水/油）纺织品可以实现纺织品自清洁功能外，在纤维表面负载光催化材料制备光催化功能型纺织品也是实现自清洁纺织品的有效途径。对于光催化型自清洁纺织品，主要是将具有光催化功能的材料附着于纤维表面，在光的作用下，光催化剂对吸附于其表面的有机污物产生强烈催化降解作用，从而达到自清洁目的。光催化技术在自清洁材料中的应用已取得国内外的广泛共识，目前研究与应用最成熟且广泛的光催化材料为TiO2，最受到科学家与工业届的关注。但由于TiO2光催化剂的光催化功能无选择性，其在纺织品表面直接使用时会引起纤维发生光降解，导致织物机械强力快速下降。In addition to super-lyophobic (water/oil) textiles that can realize the self-cleaning function of textiles, loading photocatalytic materials on the fiber surface to prepare photocatalytic functional textiles is also an effective way to realize self-cleaning textiles. For photocatalytic self-cleaning textiles, the material with photocatalytic function is mainly attached to the surface of the fiber. Under the action of light, the photocatalyst has a strong catalytic degradation effect on the organic dirt adsorbed on its surface, so as to achieve the purpose of self-cleaning. . The application of photocatalytic technology in self-cleaning materials has achieved widespread consensus at home and abroad. At present, the most mature and widely used photocatalytic material is TiO 2 , which has attracted the most attention from scientists and industries. However, due to the non-selective photocatalytic function of TiO2 photocatalyst, when it is directly used on the surface of textiles, it will cause photodegradation of fibers, resulting in a rapid decline in the mechanical strength of the fabrics.
将超疏水材料与光催化材料相结合，制备兼具光催化性能与超疏水性能的复合材料，并将其运用于纺织品自清洁整理，赋予纺织品拒水功能的同时有效降解沾污在纺织品表面的油渍，实现无氟长效自清洁纺织品的制备，在生态环保功能纺织品领域具有重要的实用价值与应用前景。鉴于此，本发明提出一种光催化型无氟超疏水自清洁纺织品的制备方法。Combine superhydrophobic materials with photocatalytic materials to prepare composite materials with both photocatalytic and superhydrophobic properties, and apply them to textile self-cleaning finishing, endowing textiles with water-repellent function and effectively degrading stains on the surface of textiles. Oil stains, to realize the preparation of fluorine-free long-lasting self-cleaning textiles, have important practical value and application prospects in the field of ecological and environmental protection functional textiles. In view of this, the present invention proposes a method for preparing a photocatalytic fluorine-free superhydrophobic self-cleaning textile.
发明内容Contents of the invention
本发明所要解决的技术问题是，针对当前含氟拒水拒油整理剂应用中的难题，提供一种光催化型无氟超疏水自清洁纺织品的制备方法，不涉及全氟辛烷磺酸盐和全氟辛酸的使用，赋予纺织品长效自清洁性能，可有效降解附着在织物表面的有机污渍，克服无氟拒水整理剂易被油渍污染的缺点，实现生态环保自清洁纺织品的高效、简易、快速制备。The technical problem to be solved by the present invention is to provide a method for preparing photocatalytic fluorine-free superhydrophobic self-cleaning textiles, which does not involve perfluorooctane sulfonate The use of PFOA and perfluorooctanoic acid endows textiles with long-term self-cleaning properties, which can effectively degrade organic stains attached to the surface of fabrics, overcome the shortcomings of fluorine-free water-repellent finishing agents that are easily polluted by oil stains, and realize the efficient, simple and rapid self-cleaning of eco-friendly textiles preparation.
本发明解决上述技术问题所采用的技术方案为：一种光催化型无氟超疏水自清洁纺织品的制备方法，包括以下步骤：The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a preparation method of photocatalytic fluorine-free superhydrophobic self-cleaning textiles, comprising the following steps:
（1）室温条件下，将疏水性二氧化硅颗粒分散于溶剂A中并超声处理获得二氧化硅分散液；然后按四氯化钛与二氧化硅分散液的体积比1：（20～30），向二氧化硅分散液中加入四氯化钛；之后将该分散液升温至60℃并搅拌均匀，再将该分散液移入密闭的聚四氟乙烯容器中进行水热处理，离心分离后获得二氧化硅/二氧化钛复合颗粒，洗涤、烘干后获得光催化超疏水复合粉体；(1) At room temperature, disperse hydrophobic silica particles in solvent A and ultrasonically treat to obtain a silica dispersion; then press the volume ratio of titanium tetrachloride to silica dispersion 1: (20-30 ), adding titanium tetrachloride to the silica dispersion; then raising the temperature of the dispersion to 60°C and stirring evenly, then transferring the dispersion into a closed polytetrafluoroethylene container for hydrothermal treatment, and centrifuging to obtain Silica/titanium dioxide composite particles, after washing and drying, obtain photocatalytic superhydrophobic composite powder;
（2）室温条件下，将光催化超疏水复合粉体分散于溶剂B中并超声处理获得光催化超疏水复合粉体分散液，再将洁净纺织品浸渍于该光催化超疏水复合粉体分散液中，浸轧、烘干得到光催化型无氟超疏水自清洁纺织品。(2) At room temperature, the photocatalytic superhydrophobic composite powder was dispersed in solvent B and ultrasonically treated to obtain a photocatalytic superhydrophobic composite powder dispersion, and then the clean textile was impregnated in the photocatalytic superhydrophobic composite powder dispersion , padding and drying to obtain photocatalytic fluorine-free superhydrophobic self-cleaning textiles.
作为优选，步骤（1）中，所述的溶剂A为苯甲醇或异丙醇；所述的二氧化硅分散液的质量浓度为0.05-0.5g/mL。Preferably, in step (1), the solvent A is benzyl alcohol or isopropanol; the mass concentration of the silica dispersion is 0.05-0.5 g/mL.
作为优选，步骤（1）中，超声处理的时间为5-15分钟；搅拌时间为3-10小时。Preferably, in step (1), the ultrasonic treatment time is 5-15 minutes; the stirring time is 3-10 hours.
作为优选，步骤（1）中，水热处理的温度为60-85℃，水热处理的时间为20-28小时。Preferably, in step (1), the temperature of the hydrothermal treatment is 60-85° C., and the time of the hydrothermal treatment is 20-28 hours.
作为优选，步骤（1）中，采用乙醇和四氢呋喃洗涤；烘干温度为75-85℃，烘干时间为10-15小时。Preferably, in step (1), ethanol and tetrahydrofuran are used for washing; the drying temperature is 75-85° C., and the drying time is 10-15 hours.
作为优选，步骤（2）中，所述的溶剂B为甲醇、乙醇或异丙醇等；所述的光催化超疏水复合粉体分散液的质量浓度为5-25g/L。Preferably, in step (2), the solvent B is methanol, ethanol or isopropanol, etc.; the mass concentration of the photocatalytic superhydrophobic composite powder dispersion is 5-25 g/L.
作为优选，步骤（2）中，超声处理的时间为5-15分钟。Preferably, in step (2), the ultrasonic treatment time is 5-15 minutes.
作为优选，步骤（2）中，所述的洁净纺织品为涤纶织物、棉织物或锦纶织物。Preferably, in step (2), the clean textiles are polyester fabrics, cotton fabrics or nylon fabrics.
作为优选，步骤（2）中，浸渍时间为3-10分钟；浸轧的轧余率为70-90%。As a preference, in the step (2), the dipping time is 3-10 minutes; the pass rate of padding is 70-90%.
作为优选，步骤（2）中，烘干温度为60-80℃，烘干时间为10-60分钟。Preferably, in step (2), the drying temperature is 60-80° C., and the drying time is 10-60 minutes.
与现有技术相比，本发明的优点在于：Compared with the prior art, the present invention has the advantages of:
1）本发明光催化型无氟超疏水自清洁纺织品的制备方法，不涉及全氟辛烷磺酸盐和全氟辛酸的使用，避免了含氟拒水拒油整理剂对环境安全和人体健康的潜在威胁；1) The preparation method of photocatalytic fluorine-free superhydrophobic self-cleaning textiles of the present invention does not involve the use of perfluorooctane sulfonate and perfluorooctanoic acid, and avoids the potential of fluorine-containing water and oil repellent finishing agents on environmental safety and human health. threaten;
2）本发明以制备的二氧化钛作为光催化材料，可以有效克服无氟拒水整理剂易被油渍沾污的缺点，能够对附着在纺织品表面的有机污渍进行光照降解，提高无氟拒水整理织物自清洁性能，实现生态环保自清洁纺织品的高效、简易、快速制备；2) The present invention uses the prepared titanium dioxide as the photocatalytic material, which can effectively overcome the shortcoming that the fluorine-free water-repellent finishing agent is easily stained by oil stains, and can degrade the organic stains attached to the surface of the textile by light, and improve the quality of the fluorine-free water-repellent finishing fabric. Self-cleaning performance, realize the efficient, simple and rapid preparation of eco-friendly self-cleaning textiles;
3）本发明中，绝大部分二氧化钛附着在二氧化硅孔隙内部，不与纺织纤维直接接触，可有效减弱光催化材料对纤维的光学脆损。3) In the present invention, most of the titanium dioxide is attached to the interior of the silica pores and does not directly contact with the textile fibers, which can effectively reduce the optical brittleness of the photocatalytic materials to the fibers.
附图说明Description of drawings
图1为实施例1获得的光催化超疏水复合粉体的TEM图片；Fig. 1 is the TEM picture of the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图2为实施例1获得的光催化超疏水复合粉体的SEM图片；Fig. 2 is the SEM picture of the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图3为实施例1获得的光催化超疏水复合粉体的EDX能谱图；Fig. 3 is the EDX energy spectrogram of the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图4为实施例1获得的光催化超疏水复合粉体中C元素的分布图；Fig. 4 is the distribution figure of C element in the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图5为实施例1获得的光催化超疏水复合粉体中O元素的分布图；Fig. 5 is the distribution figure of O element in the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图6为实施例1获得的光催化超疏水复合粉体中Ti元素的分布图；Fig. 6 is the distribution figure of Ti element in the photocatalytic superhydrophobic composite powder that embodiment 1 obtains;
图7为实施例1获得的光催化超疏水复合粉体中Si元素的分布图。FIG. 7 is a distribution diagram of Si element in the photocatalytic superhydrophobic composite powder obtained in Example 1. FIG.
具体实施方式detailed description
以下结合附图实施例对本发明作进一步详细描述。The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
实施例1：对于纯棉织物，采用本发明制备方法进行制备，具体包括以下步骤：Embodiment 1: For pure cotton fabric, adopt preparation method of the present invention to prepare, specifically comprise the following steps:
（1）室温条件下，称取2g疏水性二氧化硅纳米颗粒，加入到20mL质量浓度为0.1g/mL的苯甲醇中，利用超声细胞粉碎机处理3分钟，得到二氧化硅分散液；用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛，室温条件下搅拌1小时，然后在60℃下继续搅拌6小时；之后将该分散液移入一密闭的聚四氟乙烯容器中，并置于80℃烘箱中老化24小时，生成大量白色沉淀，将该白色沉淀离心分离，得到二氧化硅/二氧化钛复合颗粒，再依次用乙醇和四氢呋喃洗涤，最后置于80℃烘箱中烘干12小时，获得光催化超疏水复合粉体；(1) At room temperature, weigh 2 g of hydrophobic silica nanoparticles, add them to 20 mL of benzyl alcohol with a mass concentration of 0.1 g/mL, and use an ultrasonic cell pulverizer for 3 minutes to obtain a silica dispersion; Slowly add 1 mL of titanium tetrachloride to the silica dispersion with a syringe, stir for 1 hour at room temperature, and then continue stirring for 6 hours at 60°C; then transfer the dispersion into a closed polytetrafluoroethylene container, And placed in an oven at 80°C for aging for 24 hours, a large amount of white precipitate was formed, which was centrifuged to obtain silica/titanium dioxide composite particles, which were washed with ethanol and tetrahydrofuran in sequence, and finally dried in an oven at 80°C for 12 hours, the photocatalytic superhydrophobic composite powder is obtained;
（2）室温条件下，将2克光催化超疏水复合粉体分散于200mL质量浓度为10g/L的甲醇中，利用超声细胞粉碎机处理3 分钟，得光催化超疏水复合粉体分散液，再将纯棉织物浸渍于该光催化超疏水复合粉体分散液中，二浸二轧（轧余率90%）、80℃条件下烘干10分钟，得到具有光催化功能的超疏水纯棉织物。经检测，该超疏水纯棉织物与水滴的静态接触角达158°，以油酸作为油渍模拟物，经油酸沾污的功能织物丧失其拒水性，而织物在紫外光照3小时后，油渍被TiO2降解，可以恢复其拒水性，该过程重复十次后织物仍可以恢复其超疏水性能。(2) At room temperature, disperse 2 grams of photocatalytic superhydrophobic composite powder in 200 mL of methanol with a mass concentration of 10 g/L, and use an ultrasonic cell pulverizer for 3 minutes to obtain a photocatalytic superhydrophobic composite powder dispersion. Then immerse the pure cotton fabric in the photocatalytic superhydrophobic composite powder dispersion, double dipping and second rolling (90% excess rate), and dry at 80°C for 10 minutes to obtain superhydrophobic pure cotton with photocatalytic function. fabric. After testing, the static contact angle between the super-hydrophobic pure cotton fabric and water droplets reached 158°. Using oleic acid as the oil stain simulant, the functional fabric stained with oleic acid lost its water repellency, and the fabric was exposed to ultraviolet light for 3 hours. Degraded by TiO2 , its water repellency can be recovered, and the fabric can still recover its superhydrophobic property after repeating the process ten times.
实施例1获得的光催化超疏水复合粉体的TEM图片见图1，SEM图片见图2，EDX能谱图见图3，从图1可以明显看出TiO2的晶格结构。实施例1获得的光催化超疏水复合粉体中C元素的分布图见图4，O元素的分布图见图5，Ti元素的分布图见图6，Si元素的分布图见图7。The TEM picture of the photocatalytic superhydrophobic composite powder obtained in Example 1 is shown in Figure 1, the SEM picture is shown in Figure 2, and the EDX energy spectrum is shown in Figure 3. From Figure 1, it can be clearly seen that the lattice structure of TiO2 . The distribution diagram of C element in the photocatalytic superhydrophobic composite powder obtained in Example 1 is shown in Figure 4, the distribution diagram of O element is shown in Figure 5, the distribution diagram of Ti element is shown in Figure 6, and the distribution diagram of Si element is shown in Figure 7.
实施例2：对于涤纶织物，采用本发明制备方法进行制备，具体包括以下步骤：Embodiment 2: for polyester fabric, adopt preparation method of the present invention to prepare, specifically comprise the following steps:
（1）室温条件下，称取5g疏水性二氧化硅纳米颗粒，加入到30mL质量浓度为0.17g/mL的甲醇中，利用超声细胞粉碎机处理5分钟，得到二氧化硅分散液；用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛，室温条件下搅拌2小时，然后在60℃下继续搅拌6小时；之后将该分散液移入一密闭的聚四氟乙烯容器中，并置于80℃烘箱中老化24小时，生成大量白色沉淀，将该白色沉淀离心分离，得到二氧化硅/二氧化钛复合颗粒，再依次用乙醇和四氢呋喃洗涤，最后置于80℃烘箱中烘干12小时，获得光催化超疏水复合粉体；(1) At room temperature, weigh 5g of hydrophobic silica nanoparticles, add them to 30mL of methanol with a mass concentration of 0.17g/mL, and use an ultrasonic cell pulverizer for 5 minutes to obtain a silica dispersion; use a syringe Slowly add 1 mL of titanium tetrachloride to the silica dispersion, stir at room temperature for 2 hours, then continue to stir at 60°C for 6 hours; then transfer the dispersion into a closed polytetrafluoroethylene container, and Aged in an oven at 80°C for 24 hours, resulting in a large amount of white precipitate, which was centrifuged to obtain silica/titanium dioxide composite particles, then washed with ethanol and tetrahydrofuran in sequence, and finally dried in an oven at 80°C for 12 hours , to obtain photocatalytic superhydrophobic composite powder;
（2）室温条件下，将2克光催化超疏水复合粉体分散于100mL质量浓度为20g/L的乙醇中，利用超声细胞粉碎机处理5 分钟，得光催化超疏水复合粉体分散液，再将涤纶织物浸渍于该光催化超疏水复合粉体分散液中，二浸二轧（轧余率70%）、80℃条件下烘干10分钟，得到具有光催化功能的超疏水涤纶织物。经检测，该超疏水涤纶织物与水滴的静态接触角达162°，以油酸作为油渍模拟物，经油酸沾污的功能织物丧失其拒水性，而织物在紫外光照3小时后，油渍被TiO2降解，可以恢复其拒水性，该过程重复十次后织物仍可以恢复其超疏水性能。(2) At room temperature, disperse 2 grams of photocatalytic superhydrophobic composite powder in 100 mL of ethanol with a mass concentration of 20 g/L, and use an ultrasonic cell pulverizer for 5 minutes to obtain a photocatalytic superhydrophobic composite powder dispersion. Then, the polyester fabric was immersed in the photocatalytic superhydrophobic composite powder dispersion, dipped twice and rolled twice (residual rate 70%), and dried at 80°C for 10 minutes to obtain a superhydrophobic polyester fabric with photocatalytic function. After testing, the static contact angle between the super-hydrophobic polyester fabric and water droplets reaches 162°. Using oleic acid as the oil stain simulant, the functional fabric stained with oleic acid loses its water repellency, and the oil stain is removed after the fabric is exposed to ultraviolet light for 3 hours. TiO2 degrades to restore its water repellency, and the fabric can still restore its superhydrophobic properties after repeating the process ten times.
实施例3：对于涤/棉混纺织物，采用本发明制备方法进行制备，具体包括以下步骤：Embodiment 3: for polyester/cotton blended fabric, adopt preparation method of the present invention to prepare, specifically comprise the following steps:
（1）室温条件下，称取3g疏水性二氧化硅纳米颗粒，加入到30mL质量浓度为0.1g/mL的苯甲醇中，利用超声细胞粉碎机处理4分钟，得到二氧化硅分散液；用注射器向二氧化硅分散液中缓缓加入1mL 四氯化钛，室温条件下搅拌2小时，然后在60℃下继续搅拌6小时；之后将该分散液移入一密闭的聚四氟乙烯容器中，并置于80℃烘箱中老化24小时，生成大量白色沉淀，将该白色沉淀离心分离，得到二氧化硅/二氧化钛复合颗粒，再依次用乙醇和四氢呋喃洗涤，最后置于80℃烘箱中烘干12小时，获得光催化超疏水复合粉体；(1) At room temperature, weigh 3 g of hydrophobic silica nanoparticles, add them to 30 mL of benzyl alcohol with a mass concentration of 0.1 g/mL, and use an ultrasonic cell pulverizer for 4 minutes to obtain a silica dispersion; Slowly add 1 mL of titanium tetrachloride to the silica dispersion with a syringe, stir at room temperature for 2 hours, then continue to stir at 60°C for 6 hours; then transfer the dispersion into a closed polytetrafluoroethylene container, And placed in an oven at 80°C for aging for 24 hours, a large amount of white precipitate was formed, which was centrifuged to obtain silica/titanium dioxide composite particles, which were washed with ethanol and tetrahydrofuran in sequence, and finally dried in an oven at 80°C for 12 hours, the photocatalytic superhydrophobic composite powder is obtained;
（2）室温条件下，将2克光催化超疏水复合粉体分散于150mL质量浓度为13.3g/L的甲醇中，利用超声细胞粉碎机处理4 分钟，得光催化超疏水复合粉体分散液，再将涤/棉混纺织物浸渍于该光催化超疏水复合粉体分散液中，二浸二轧（轧余率80%）、80℃条件下烘干30分钟，得到具有光催化功能的超疏水涤/棉混纺织物。经检测，该超疏水涤/棉混纺织物与水滴的静态接触角达158°，以油酸作为油渍模拟物，经油酸沾污的功能织物丧失其拒水性，而织物在紫外光照3小时后，油渍被TiO2降解，可以恢复其拒水性，该过程重复十次后织物仍可以恢复其超疏水性能。(2) At room temperature, disperse 2 grams of photocatalytic superhydrophobic composite powder in 150 mL of methanol with a mass concentration of 13.3 g/L, and use an ultrasonic cell pulverizer for 4 minutes to obtain a photocatalytic superhydrophobic composite powder dispersion , and then immerse the polyester/cotton blended fabric in the photocatalytic superhydrophobic composite powder dispersion, dipping and rolling twice (passing rate 80%), and drying at 80°C for 30 minutes to obtain superhydrophobic photocatalytic Hydrophobic poly/cotton blend. After testing, the static contact angle between the superhydrophobic polyester/cotton blended fabric and water droplets reaches 158°. Using oleic acid as the oil stain simulant, the functional fabric stained with oleic acid loses its water repellency, and the fabric loses its water repellency after 3 hours of ultraviolet light. , the oil stain was degraded by TiO 2 and its water repellency could be recovered, and the fabric could still recover its superhydrophobic property after repeating the process ten times.
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